Automatic stock-indicator for blast-furnaces



(No Model.) S. McGLURE 8v .0. P. PHILLIPS.

AUTOMATIC STOCK INDICATOR FOR BLAST FURNACES. I

No. 498,676. Patented May 30, 1893,

' under and over guide pulleys 7 and 8 down 'to 'usual landing. Through the top are tubes 2,

forming an open passage to the interior of the.

UNITED STATES PATENT OFFICE.

AUTOMATIC STOCK-INDICATOR FOR BLAST-FURNACES.

SPECIFICATION forming part of Letters Patent No. 498,676, dated May 30, 1893.

Application filed November 8. 1892. Serial No. 451.317. (No model.)

To all whom it may concern:

Be it known that we, SAMUEL MCCLURE and CHARLES F. PHILLIPS, citizens of the United States of America, residing at Shai'Omin-the county of Mercer and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Stock-Indicators for Blast-Furnaces, of which the following is a specification. v 1

Our invention 'is an automatic indicator for blastfurnaces, and is designed to show the' height of the stock in the heating chamber of the furnace. It is illustrated in 'the'accompanying drawing, in which the figure shows a central vertical sectionof the stockjot the furnace, and its ordinary attachments, with the indicating apparatus in side elevation.

In the drawing, A, represents the stack in which is the stock B. At the mouth is the 2, madevertical and set near the sidewalls, preferablydirectly opposite each other and stack. In these are set the indicator rods 3,- which have free vertical movement in said tubes, and are thereby arranged to rest upon the upper surface of the stock. The tubes serve as guides for the rods, and to convey the 1 gases above the heads of the workmen, as they stand upon the platform. To the upper end of the rods are attached ropes 4 which extend over pulleys 5, on standards 6, and

of therods causes them to descend, andrest drums located at or near the base of the stack,

or at any convenient place. The drums 9 have cranks and are adapted towind the ends and raise the rods.

When allowed to turn freely, the cords are slackened, and the weight upon the stock. Along side the lower end of SAMUEL MOCLURE AND CHARLES F. PHILLIPS, OF SHARON, PENNSYLVANIA.

, 4 I the cords are graduated scales lOo'ver which t an index 11, fixed to each rope, passes up and downwith the movement of the rods. lThBSQ] indexes mark at all times. on ,the scale" and show to the attendant theheight of the stock sonal examination of the: mouth of thefur- 1 but the number is not material. 7 'Weclaim In combination with a furnace, a tube ez t-t v We have shown the apparatusin duplicate, 5 r "f. I

tending from the top thereof, an indicator rod located in said tube, a supporting pulley arranged above said tube on a vertical standard, a rope or cord attached to the upper end of y the indicator rod, passing over-said pulley and over other'pulleys to a drum, an index onth'e lower end of thecord' or rope, and ascale extending upwardly from the drum support, substantially as described.

In testimony whereof we affix our signatures I CHARLES" F. PHILLIPS. V

. 514 in the furnace,heretofore ascertained by per-- 

